Car is a pumpgas 490, should make 500hp or so. car weighs 3550 w/me has a 9inch with 3:73 and 27in. tall. Converter is a 10" TS unit stalling at about 4000 (good to 800hp so they say) with a rossler t400 rev. manual. It's a footbrake car and normally 60fts. in the 1.7 range and runs close to 120mph. Trans. shifts hard all the time and goes into gear without delay. The gear shifts hit hard and the car feels like it falls flat on its face on each shift. Brand new motor run on the stand and tuned. This converter is converter #2, had a Protorque with same stall, acted EXACTLY the same. What gives?